Control of the Shared Mind
The Dark HalfThad and Stark struggle over access to each other’s thoughts, using writing, memory, and concealment as instruments in a contest for control.
increasing
Bearing strength in each event
decreasing
The First Intrusion

The First Intrusion
Writing without awareness
Thad hears the birds and writes on his manuscript without remembering the act. The words reproduce a phrase associated with Stark’s crimes.
A mind no longer private
The episode suggests that Thad can receive knowledge from elsewhere within their connection. The boundary between his thoughts and Stark’s begins to fail.
A Deliberate Contact

A Deliberate Contact
Testing the connection
Thad tries to induce automatic writing and succeeds in seeing fragments of Stark’s memories. He learns that the contact can carry more than a phrase.
The danger of access
The encounter permits discovery but also exposes Thad to Stark’s mind. The experiment injures both men and teaches Stark that Thad can reach him.
Stark’s Countermove

Stark’s Countermove
A wound in reply
Stark wakes with a pen through his hand and realizes Thad has entered his thoughts. He stabs himself to break the connection and injures Thad at the same time.
Control is reversible
Neither man has permanent command. Their shared access turns a private mental struggle into a physical contest with escalating consequences.
The Hidden Advantage

The Hidden Advantage
Thad withholds knowledge
Thad knows the sparrows are gathering but does not tell Stark. He uses ordinary dialogue to conceal what he intends to do.
Unequal awareness
Stark can sense Thad’s thoughts in some circumstances, but the birds remain outside his knowledge. The concealed difference gives Thad a fragile strategic advantage.
The Minds Separate

The Minds Separate
The link breaks under force
As the sparrows enter and Thad fights to protect the twins, Stark’s attention turns to immediate survival. Their shared creative space becomes a physical battlefield.
A final boundary
Stark is carried away, ending the direct contest. Thad survives with a wound and a knowledge of connection that cannot be entirely undone.
Early June 1988, during Thad’s fugue
Mid-June 1988, late at night in Thad’s study
The day after Thad’s first contact
The final writing session, before the birds attack
The final assault inside the study